It's a very, very cool mod, and has a huge amount of code. The villagers actually transport goods back and forth, and work together. For instance, if there is a quarry and a woodcutter, they burn oak for charcoal and turn cobble to stone for use in the buildings. Men do the work, women move things back and forth. Most sub buildings only work to full strength after you have the building, the guy who works there, and he gets a wife. A lot of input is needed from the player at times. If you just go to a Norman village and try to buy weapons and tools, none are ever in stock. It's only after you have a blacksmith and an armory in the village that you can get them. And the player needs to sell diamond weapons and armor to the keep, they get transferred to the artisans, who then turn them into Norman weapons, tools, and armor. Of course, the guards may grab the first few sets for themselves.